{
	"$schema": "https://ui.shadcn.com/schema/registry-item.json",
	"name": "Lightfall-JS-TW",
	"title": "Lightfall",
	"description": "Colorful light streaks raining down a glowing tunnel with a cursor light.",
	"type": "registry:component",
	"files": [
		{
			"type": "registry:component",
			"path": "Lightfall/Lightfall.jsx",
			"content": "import { useEffect, useRef } from 'react';\nimport { Renderer, Program, Mesh, Triangle } from 'ogl';\n\nconst MAX_COLORS = 8;\n\nconst hexToRGB = hex => {\n  const c = hex.replace('#', '').padEnd(6, '0');\n  const r = parseInt(c.slice(0, 2), 16) / 255;\n  const g = parseInt(c.slice(2, 4), 16) / 255;\n  const b = parseInt(c.slice(4, 6), 16) / 255;\n  return [r, g, b];\n};\n\nconst prepColors = input => {\n  const base = (input && input.length ? input : ['#A6C8FF', '#5227FF', '#FF9FFC']).slice(0, MAX_COLORS);\n  const count = base.length;\n  const arr = [];\n  for (let i = 0; i < MAX_COLORS; i++) arr.push(hexToRGB(base[Math.min(i, base.length - 1)]));\n  const avg = [0, 0, 0];\n  for (let i = 0; i < count; i++) {\n    avg[0] += arr[i][0];\n    avg[1] += arr[i][1];\n    avg[2] += arr[i][2];\n  }\n  avg[0] /= count;\n  avg[1] /= count;\n  avg[2] /= count;\n  return { arr, count, avg };\n};\n\nconst vertex = `\nattribute vec2 position;\nattribute vec2 uv;\nvarying vec2 vUv;\nvoid main() {\n  vUv = uv;\n  gl_Position = vec4(position, 0.0, 1.0);\n}\n`;\n\nconst fragment = `\nprecision highp float;\n\nuniform vec3  iResolution;\nuniform vec2  iMouse;\nuniform float iTime;\n\nuniform vec3  uColor0;\nuniform vec3  uColor1;\nuniform vec3  uColor2;\nuniform vec3  uColor3;\nuniform vec3  uColor4;\nuniform vec3  uColor5;\nuniform vec3  uColor6;\nuniform vec3  uColor7;\nuniform int   uColorCount;\n\nuniform vec3  uBgColor;\nuniform vec3  uMouseColor;\nuniform float uSpeed;\nuniform int   uStreakCount;\nuniform float uStreakWidth;\nuniform float uStreakLength;\nuniform float uGlow;\nuniform float uDensity;\nuniform float uTwinkle;\nuniform float uZoom;\nuniform float uBgGlow;\nuniform float uOpacity;\nuniform float uMouseEnabled;\nuniform float uMouseStrength;\nuniform float uMouseRadius;\n\nvarying vec2 vUv;\n\nvec3 palette(float h) {\n  int count = uColorCount;\n  if (count < 1) count = 1;\n  int idx = int(floor(clamp(h, 0.0, 0.999999) * float(count)));\n  if (idx <= 0) return uColor0;\n  if (idx == 1) return uColor1;\n  if (idx == 2) return uColor2;\n  if (idx == 3) return uColor3;\n  if (idx == 4) return uColor4;\n  if (idx == 5) return uColor5;\n  if (idx == 6) return uColor6;\n  return uColor7;\n}\n\nvec3 tanhv(vec3 x) {\n  vec3 e = exp(-2.0 * x);\n  return (1.0 - e) / (1.0 + e);\n}\n\nvec2 sceneC(vec2 frag, vec2 r) {\n  vec2 P = (frag + frag - r) / r.x;\n  float z = 0.0;\n  float d = 1e3;\n  vec4 O = vec4(0.0);\n  for (int k = 0; k < 39; k++) {\n    if (d <= 1e-4) break;\n    O = z * normalize(vec4(P, uZoom, 0.0)) - vec4(0.0, 4.0, 1.0, 0.0) / 4.5;\n    d = 1.0 - sqrt(length(O * O));\n    z += d;\n  }\n  return vec2(O.x, atan(O.z, O.y));\n}\n\nvoid mainImage(out vec4 o, vec2 C) {\n  vec2 r = iResolution.xy;\n  vec2 uv0 = (C + C - r) / r.x;\n  float T = 0.1 * iTime * uSpeed + 9.0;\n  float angRings = max(1.0, floor(6.28318530718 * max(uDensity, 0.05) + 0.5));\n  vec2 Y = vec2(5e-3, 6.28318530718 / angRings);\n\n  vec2 c0 = sceneC(C, r);\n  vec2 cdx = sceneC(C + vec2(1.0, 0.0), r);\n  vec2 cdy = sceneC(C + vec2(0.0, 1.0), r);\n  vec2 dCx = cdx - c0;\n  vec2 dCy = cdy - c0;\n  dCx.y -= 6.28318530718 * floor(dCx.y / 6.28318530718 + 0.5);\n  dCy.y -= 6.28318530718 * floor(dCy.y / 6.28318530718 + 0.5);\n  vec2 fw = abs(dCx) + abs(dCy);\n  C = c0;\n\n  vec2 P = vec2(2.0, 1.0) * uv0 - (r / r.x) * vec2(0.0, 1.0);\n  vec4 O = vec4(uBgColor * 90.0 * uBgGlow / (1e3 * dot(P, P) + 6.0), 0.0);\n\n  float mGlow = 0.0;\n  if (uMouseEnabled > 0.5) {\n    vec2 mN = (iMouse + iMouse - r) / r.x;\n    float md = length(uv0 - mN);\n    mGlow = exp(-md * md / max(uMouseRadius * uMouseRadius, 1e-4)) * uMouseStrength;\n    O.rgb += uMouseColor * mGlow * 0.25;\n  }\n\n  float zr = 5e-4 * uStreakWidth;\n  vec2 rr = vec2(max(length(fw), 1e-5));\n  float tail = 19.0 / max(uStreakLength, 0.05);\n\n  for (int m = 0; m < 16; m++) {\n    if (m >= uStreakCount) break;\n    float jf = float(m) + 1.0;\n    float ic = fract(sin(dot(vec2(jf, floor(C.x / Y.x + 0.5)), vec2(7.0, 11.0)) * 73.0));\n    vec2 Pp = C - (T + T * ic) * vec2(0.0, 1.0);\n    Pp -= floor(Pp / Y + 0.5) * Y;\n    float h = fract(8663.0 * ic);\n    vec3 col = palette(h);\n    float weight = mix(1.5, 1.0 + sin(T + 7.0 * h + 4.0), uTwinkle);\n    weight *= (1.0 + mGlow * 2.0);\n    vec2 inner = vec2(length(max(Pp, vec2(-1.0, 0.0))), length(Pp) - zr) - zr;\n    vec2 sm = vec2(1.0) - smoothstep(-rr, rr, inner);\n    O.rgb += dot(sm, vec2(exp(tail * Pp.y), 3.0)) * col * weight;\n    C.x += Y.x / 8.0;\n  }\n\n  vec3 colr = sqrt(tanhv(max(O.rgb * uGlow - vec3(0.04, 0.08, 0.02), 0.0)));\n  o = vec4(colr, uOpacity);\n}\n\nvoid main() {\n  vec4 color;\n  mainImage(color, vUv * iResolution.xy);\n  gl_FragColor = color;\n}\n`;\n\nconst Lightfall = ({\n  className,\n  dpr,\n  paused = false,\n  colors = ['#A6C8FF', '#5227FF', '#FF9FFC'],\n  backgroundColor = '#0A29FF',\n  speed = 0.5,\n  streakCount = 2,\n  streakWidth = 1,\n  streakLength = 1,\n  glow = 1,\n  density = 0.6,\n  twinkle = 1,\n  zoom = 3,\n  backgroundGlow = 0.5,\n  opacity = 1,\n  mouseInteraction = true,\n  mouseStrength = 0.5,\n  mouseRadius = 1,\n  mouseDampening = 0.15,\n  mixBlendMode\n}) => {\n  const containerRef = useRef(null);\n  const rafRef = useRef(null);\n  const programRef = useRef(null);\n  const meshRef = useRef(null);\n  const geometryRef = useRef(null);\n  const rendererRef = useRef(null);\n  const mouseTargetRef = useRef([0, 0]);\n  const lastTimeRef = useRef(0);\n\n  useEffect(() => {\n    const container = containerRef.current;\n    if (!container) return;\n\n    const renderer = new Renderer({\n      dpr: dpr ?? (typeof window !== 'undefined' ? window.devicePixelRatio || 1 : 1),\n      alpha: true,\n      antialias: true\n    });\n    rendererRef.current = renderer;\n    const gl = renderer.gl;\n    const canvas = gl.canvas;\n\n    canvas.style.width = '100%';\n    canvas.style.height = '100%';\n    canvas.style.display = 'block';\n    container.appendChild(canvas);\n\n    const { arr, count, avg } = prepColors(colors);\n\n    const uniforms = {\n      iResolution: { value: [gl.drawingBufferWidth, gl.drawingBufferHeight, 1] },\n      iMouse: { value: [0, 0] },\n      iTime: { value: 0 },\n      uColor0: { value: arr[0] },\n      uColor1: { value: arr[1] },\n      uColor2: { value: arr[2] },\n      uColor3: { value: arr[3] },\n      uColor4: { value: arr[4] },\n      uColor5: { value: arr[5] },\n      uColor6: { value: arr[6] },\n      uColor7: { value: arr[7] },\n      uColorCount: { value: count },\n      uBgColor: { value: hexToRGB(backgroundColor) },\n      uMouseColor: { value: avg },\n      uSpeed: { value: speed },\n      uStreakCount: { value: Math.max(1, Math.min(16, Math.round(streakCount))) },\n      uStreakWidth: { value: streakWidth },\n      uStreakLength: { value: streakLength },\n      uGlow: { value: glow },\n      uDensity: { value: density },\n      uTwinkle: { value: twinkle },\n      uZoom: { value: zoom },\n      uBgGlow: { value: backgroundGlow },\n      uOpacity: { value: opacity },\n      uMouseEnabled: { value: mouseInteraction ? 1 : 0 },\n      uMouseStrength: { value: mouseStrength },\n      uMouseRadius: { value: mouseRadius }\n    };\n\n    const program = new Program(gl, { vertex, fragment, uniforms });\n    programRef.current = program;\n\n    const geometry = new Triangle(gl);\n    geometryRef.current = geometry;\n    const mesh = new Mesh(gl, { geometry, program });\n    meshRef.current = mesh;\n\n    const resize = () => {\n      const rect = container.getBoundingClientRect();\n      renderer.setSize(rect.width, rect.height);\n      uniforms.iResolution.value = [gl.drawingBufferWidth, gl.drawingBufferHeight, 1];\n    };\n\n    resize();\n    const ro = new ResizeObserver(resize);\n    ro.observe(container);\n\n    const onPointerMove = e => {\n      const rect = canvas.getBoundingClientRect();\n      const scale = renderer.dpr || 1;\n      const x = (e.clientX - rect.left) * scale;\n      const y = (rect.height - (e.clientY - rect.top)) * scale;\n      mouseTargetRef.current = [x, y];\n      if (mouseDampening <= 0) {\n        uniforms.iMouse.value = [x, y];\n      }\n    };\n    if (mouseInteraction) {\n      canvas.addEventListener('pointermove', onPointerMove);\n    }\n\n    const loop = t => {\n      rafRef.current = requestAnimationFrame(loop);\n      uniforms.iTime.value = t * 0.001;\n      if (mouseDampening > 0) {\n        if (!lastTimeRef.current) lastTimeRef.current = t;\n        const dt = (t - lastTimeRef.current) / 1000;\n        lastTimeRef.current = t;\n        const tau = Math.max(1e-4, mouseDampening);\n        let factor = 1 - Math.exp(-dt / tau);\n        if (factor > 1) factor = 1;\n        const target = mouseTargetRef.current;\n        const cur = uniforms.iMouse.value;\n        cur[0] += (target[0] - cur[0]) * factor;\n        cur[1] += (target[1] - cur[1]) * factor;\n      } else {\n        lastTimeRef.current = t;\n      }\n      if (!paused && programRef.current && meshRef.current) {\n        try {\n          renderer.render({ scene: meshRef.current });\n        } catch (e) {\n          console.error(e);\n        }\n      }\n    };\n    rafRef.current = requestAnimationFrame(loop);\n\n    return () => {\n      if (rafRef.current) cancelAnimationFrame(rafRef.current);\n      if (mouseInteraction) canvas.removeEventListener('pointermove', onPointerMove);\n      ro.disconnect();\n      if (canvas.parentElement === container) {\n        container.removeChild(canvas);\n      }\n      const callIfFn = (obj, key) => {\n        if (obj && typeof obj[key] === 'function') {\n          obj[key].call(obj);\n        }\n      };\n      callIfFn(programRef.current, 'remove');\n      callIfFn(geometryRef.current, 'remove');\n      callIfFn(meshRef.current, 'remove');\n      callIfFn(rendererRef.current, 'destroy');\n      programRef.current = null;\n      geometryRef.current = null;\n      meshRef.current = null;\n      rendererRef.current = null;\n    };\n  }, [\n    dpr,\n    paused,\n    colors,\n    backgroundColor,\n    speed,\n    streakCount,\n    streakWidth,\n    streakLength,\n    glow,\n    density,\n    twinkle,\n    zoom,\n    backgroundGlow,\n    opacity,\n    mouseInteraction,\n    mouseStrength,\n    mouseRadius,\n    mouseDampening\n  ]);\n\n  return (\n    <div\n      ref={containerRef}\n      className={`w-full h-full overflow-hidden relative ${className ?? ''}`}\n      style={{\n        ...(mixBlendMode && { mixBlendMode })\n      }}\n    />\n  );\n};\n\nexport default Lightfall;\n"
		}
	],
	"registryDependencies": [],
	"dependencies": [
		"ogl@^1.0.11"
	]
}